Update:
Ten days just flew by. I joked elsewhere that the hollow part was easy, whittling them to look like bamboo would have been more difficult if it hadn't been for taking up
Pencil Carving so long ago. But it got me to thinking about bamboo.
Batten #10, the 21'er, is on the ways. And I use "ways" in the strict sense of the word. The risers on which I'd assembled the previous 9 battens relied only on the levelness of the table, which was pretty good but not perfect. For #10 I stretched a stringline and screwed additional mini-risers to the level-line. Then I re-stretched the stringline for a dead-straight line to adjust for side-to-side clamping.
Bamboo, right, the other 9, 18'-2" long, are hollow from end to end with the exception of solid 8" sections at the ends for bolts or "fasteners - to be installed by others", as they say on architectural drawings I've dealt with for eons. You gotta love architects, "If I draw it, it will become." To which my reaction always was, "sure buddy, as long as you have engineers to clean up your mess." But I digress.
For #10, I made 8" filler blocks for the ends, the section at 18'-2", and 4" blocks every 30" along the way similar to the solid parts that stiffens bamboo along its length.
About 1-thru-9: I got way too complicated. or maybe mentally involved. They are made from 2 pieces, L-shaped and mortised and tenoned, the mortise at the "top" of the L, the tenon at the foot. It all worked out OK. They fit perfectly, but it could have been much less work making them simple 4-sided boxes like #10. #10 is rabbeted corners accomplished with a small laminate trimmer. And despite 85 clamps at work, I remembered to clean up the squeeze-out (glue) before it's had a chance to set up.
Time to reupholster a chair for She Who Puts Up With Me.
Later Taters...
"MD!"